Improvement in handles for boring-tools



WITNESSES I Hi. STANLEY} Handles for Boring-Tools.

N 168,933 'Pa ented0ct.19,1875.-

' monnns.

u. PETERS, PMDTO-LITMOGRAPHER WASHINGTON, D c.

UNITED STATE HENRY STANLEY, OF ST.

PATENT OFFICE.

JOHNSBURY, VERMONT.

IMPROVEMENT IN.HANDLES FOR BORING-TOOLS.

Specification forming part of Letters Patent No. 168,933, dated October19, 1875; application filed April 18, 1874. 7

To all whom it may concern 1 Be it known that I, HENRY STANLEY, of St.Johnsbury, in the county of Caledonia and State of Vermont, haveinvented a new and Improved Handle for Boring-Tools, of which thefollowing is a specification:

In the accompanying drawing, Figures 1 and 2, respectively, show avertical central section and a front View of a bit-stock withspirit-level attached; and Figs. 3 and 4 represent a side view andvertical transverse section on the line 0 c, Fig. 3, of an auger-handlewith spirit-level.

Similar letters of reference indicate corresponding parts.

The object of my invention is to improve the handles of boring and othertools in such a manner that they may be handled under any required fixedangle, and the work be performedmore accurately and without requiringspecial skill.

My invention consists of the combination of the tool-handle or bit-stockwith a graduated angular or circular spirit-level set into a protectingrecess of the handles.

In the drawing, A represents the bit stock or handle of a boring orother tool which is desired to be used under certain defined angles.Handle A is recessed in suitable manner and supplied either withseparate horizontal and vertical spirit-levels, or, preferably,

with one spirit-level, B, of circular shape, which combines theadvantages of the two former. The spirit-level B is made somewhat largerin size than the quadrant of the circle or sectionof the handle part towhich it is applied, it being set into a vertical recess of the handle,cemented or otherwise fastened and suitably protected therein.

The spirit-level B is graduated, and allows the boring in horizontal orvertical direction, or any intermediate angle, -by retaining the bubbleon the required point of the tube during work. The level B is insertedinto the most convenient part of the handle, so that it can be easilyseen during the Work, and the tool be directed thereby. It forms a veryconvenient and useful addition to the handles, and enables unskilledworkmen to do the work in a quick and accurate manner.

Having thus described my invention, Iclairn as new and desire to secureby Letters Patent The combination, with handle A, of the arc-shapedspirit-level B, having a graduated scale thereon, and located withinacorrespondinglycurved part of the handle, as and for the purposespecified.

HENRY STANLEY. Witnesses:

SETH A. FIFE, R. F. PARKER.

